packman vs chapman

packman and chapman both are nouns.

Word	Noun	Adjective	Verb	Adverb
packman	Yes	No	No	No
chapman	Yes	No	No	No

As nouns, chapman is a hyponym of packman; that is, chapman is a word with a more specific, narrower meaning than packman:

packman: someone who travels about selling his wares (as on the streets or at carnivals)
chapman: archaic term for an itinerant peddler

Other hyponyms of packman include cheapjack, crier, muffin man, sandboy, transmigrante.

packman (noun)	chapman (noun)
someone who travels about selling his wares (as on the streets or at carnivals)	archaic term for an itinerant peddler